Drying cylinder



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q 1,586,22ff f PATENT Forifice;Y

WILLIAM S. ROWLEY lAND .JAMES WARNER BUTTERWORTH, OF PHILADELPHIA,

PENNSYLVANIA, ASBIGNORS TO H. W.

ronA'rIoN or PENNSYLVANIA.

DRYING CYLINDER.

Application led Iannary 25, 1922i Serial-No. $1,539.

The object of our invention is to provide means, in rotary drying cylindersfor textile and other industries, whereby air may be readily and `automatically removed therefrom when turning on steam in puttingthe .dryers into operation or at any other time when accumulations of air may l from any cause arise within the drying cyllnders.

Our invention consists in providing .the

drying cylinders with means for supplying `steam to and discharging water of condensation from the interior of the cylinders and also with one or more thermostatically operated valves arranged in the head or heads relatively near the axis of rotation so as to be at all times above the water level of the condensed steam within said cylinder, said valves permitting the escape of air but restricting or wholly preventing the escape 2 of material quantities of steam. In the preferred arrangement, we provide two thermostatic valves respectively located on opposite sides of the axis of revolution and deslrably having said valves res ectively opemng 5 through the opposite hea s ofthe cylinder. l Our invention also comprehends details of construction, which together` with the features above specified, nominare fully described hereinafter and specifically defined in the claims. 4

l Referrin to the drawings: F1g. 41 isa longitudin sectional view illustrating a drymg cylinder embodying our 1m rovements; Fig. 2 is an end view of the rymg cylinder`at the steam discharge or return .side thereof; Fig. 3 is a perspective view of the condensation water collecting and discharging means, with portions broken away; and Fig. 4 is a transverse section taken on 4 line 4-4 of Fig. 1.

24 is a sheet metal cylindrical body whose ends are fitted'upon the res ective heads orv ends 2 and 3` and tightly c amped thereon by clamping bands. The heads 2 and 3 are each provided with hollow journals. On the steam receiving end, the hub of the `journal 5 has secured to it the usual driving gear 17 by which the cylinder may be maintained in geared relation to othersimilar drying cylinders. The journal 5 on the steam supply end is journaled in a bearing 13 of the pedestal 12 which is madeV hollow for ermitting the passage of steam to the ol'- low cylinder journal and thence into with an adjustable the cylinder. The pedestal is provided gland 14 surrounding vthe end of the -hollow journal and adapted to compress a -suitable packing' of condensation. The pedestal is provided with an adjustable gland `9 for compressing packing '10 to make atight joint and the gland is clamped in position by means of a screw 11. In addition to this constructionl for the escape of the water of condensation, the cylinder is provided With watercollecting and discharging means'comprising -sheet ymetal scoops 18 connected by radial pipes 19 with a ,tubular part 2O ftting'into the hollow journal 4, to collect the .water during` the rotation of the cylinder and cause it to be discharged through the water outlet end of the apparatus. All of the description of the cylinders so far describedis of usual construction and may Ibe taken as typical of the form of cylinder to which our improvements are applied.

21 and 22 are two thermostatic air relief valves and these are respectively arranged at op osite sides ofthe .axis of the drying c lin er and preferably one at each end t ereof, as shown. The thermostatic valves are arranged intermediate of the outer cylindrical portion and the hollow journals Iand are screwed into the ca st metal heads 2 and 3, as shown, their location being at a considerable distance from the peripheral surface of the cylinder, so as at all times to be above the level of the waterof condensation which may collect therein. In caselof excessive quantities of water of condensation, as'

when starting up from a cold condition, it will be understood that there will at all times be one of the thermostatic valves open through the end of the cylinder at a point vat least as high as `the level of the axis of rotation, so that if from any cause one of,

the thermostatic valves became submerged' the other will at least be in operative position to discharge the air.

These thermostatic valves may be of any construction'- We pre which will ypermit the free escape of air While restricting or preventing the escape of steam, and as such valves are of well known construction, lit Will not be necessary to describe their detailed construction. It will suic'e to point out that valves of this character have valves which are automatically closed when steam attempts to pass through the valves and thereby raise their temperature, but which in the presence of accumulation of air automatically open to permit the escape of the air which is always cooler than the steam.

It 'Will be understood that While We have shown these thermostatic valves respectively arranged upon different ends of the cylinder, both valves may be arranged at one end, if

so desired, but in any event, they will be on opposite sides of the axis of rotation. It is important that the thermostatic yvalves shall open directly into the cylinder itself, as distinguished from communicating with the Water discharge pedestal or journal, as such locations permit the valves to become clogged and the presence of the water interferes with the free escape of the air. More-l over, as the parts 18, 19 and 20 practically exclude the free escape of air into the pedestal 6 when there is Water of condensation in the-cylinder, it is manifest that the use of thermostatic valves on the pedestal would not accomplish the desired result. When these thermostats are arranged, as shown, it is manifest that the Water of condensation could not Vaccumulate in any manner which Would prevent the free delivery of air from within the cylinder to the atmosphere, so as to permit ready ingress of steam and rapid heating of the cylinder.

While We have shown two thermostatic valves 21 and 22, it Will be understood that satisfactory results may be accomplished by the employment of the t'hermostatic valve 21 alone, when arranged at a considerable distance from the peripheral surface of the cylinder and when opening into the cylinder at the end most distant from the steam inlet and arranged independently of the Water dischar ng devices 18,19 and-20, though ir to employ two such thermostatic valves and, moreover, to arrange these valves at opposite ends of the. cylinder for more rapidly permitting the escape of the air and also for delivering the air simultaneousl from the most distant parts of Ithe cylin- The means for collecting and discharging y the Water of condensation from the interior of the drying cylinder is shown in detail more particularly in Fig. 3. It comprises 'a scoop device 18 having a division Wall 18 Whose plane is radial of the cylinder so that water may pass in at either side, according tothe direction of rotation, and be guided along the vertical division wall toward the axis of the cylinder. At the end of thev vision Wall 20a, the plane of which is at right angles With the plane of the division Wall 19l of the tubular part 19. In this manner, the scoop from either side, according `to which direction the cylinder is rotating, receives water of condensation and causes it to be lifted and to flow outward along the parts 18a, 19lil and 20, as parts 18El and 19a assume a horizontal plane, and this is esl pecially useful When tWo such scoops arranged diametrically opposite and their connections are employed, as shown in Fig. 1, as it prevents the Water which is collected by one scoop freely passing by its tubular passage 19 and tubular part 20 down the other tubular passage 1,9 and through the other diametrically opposite scoop and back into the cylinder as said parts descend during the rotation of the cylinder. If it were not for these division plates 19a and 20a, the Water lifted by one scoop 18 would be discharged through the part 19 and the other diametrically opposite scoop 18 and back into the cylinder. By my improvement, I am cnabled to use-'two scoops With a single discharge,"and, moreover, the construction is such that the cylinder may revolve in either direction and perform its function perfectly.

It will now be apparent that We have devised a novel and useful construction which embodies the features of advantage enumerated as desirable, and while We have in the present instance shown and described the preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, it is to be understood that We do not restrict ourselves to the details, as the same are susceptible of modification in various particulars without departing from the spirit or scope of the invention.

Having now described our invention, what We claim as new and desire to secure by Letters Patent is:

1. A drying cylinder provided with means at one end for supporting the cylinder and lsupplying steam thereto and provided With means at, the other end for also supporting the cylinder and for permitting the discharge of water or condensation therefrom, said means having water passages for collectin and discharging Water of condensation rom the interior` of the cylinder and delivering it `into the supporting and discharging means incombination with an of the cylinder and at a position intermedia the other `ate of the circumferential body of the cylinder and the axis thereof and normally located on the cylinder as to be above the level of the water ofcondensation therein, said valve permitting the free escape of airfrom within the cylinder to the atmosphere but restricting or preventing the escape of steam therefrom. Y

2. The invention according to claim 1, wherein the cylinder is provided with a second automatic valve arranged in respect to automatic valve so that the two valves will be respectively arranged on opposite sides of the axis of rotation of the cylinder.

3. The invention according to claim 1, wherein the cylinder is provided with a second automatic valve arranged in respect to the other automatic valve so that the two valves will be respectively arranged on opposite sides of the axis of rotation of the cylinder, and in which further, the second automatic valve is arranged at the opposite end of the cylinder to which the other automatic valve is applied.

4. The invention according to claim 1, wherein further, the means for collecting and discharging the water of condensation from the interior of the cylinder is adapted for operative functioning when the cylinder is rotated in either direction and comprises a pairof scoops each arranged against the inner peripheral surface of the cylinder 'and open circumferentially at opposite sides, said scoops provided with radially arranged tubular parts having their inner ends adjacent to one of the heads of the cylinder and communicating with a longitudinal tubular part fitted within the journal of the cylinder and closed at its end extending within the cylinder, and said scoops, radial tubular parts and axially arranged longitudinal tubular part being each divided by division walls so that the water of condensation collected by one scoop passes along one side of the division walls to the point of discharge and the water of condensation collected by the diametri cally opposite scoop causes the water of condensation to flow along the opposite side of the division walls to the point of discharge.

5. A drying cylinder adapted for operative functioning when rotated in eithefr direction provided with means at one end for supporting the cylinder and supplying steam thereto and provided with means at the other end for supporting the cylinder and for causin the discharge of water of condensation t erefrom, said latter means comprising a pair of scoops each arranged against the inner peripheral surface of the cylinder and open circumferentially at opposite sides, said scoops provided with radially arranged tubular parts having their inner ends adjacent to one of the heads of the cylinder and communicating with a longitudinal tubular part fitted within the journal part of the cylinder and closed at its end extending within the cylinder, and said scoops, radial tubular arts and axially arranged longitudinal tu ular part being each divided by division walls, so that the water of condensation collected by one scoop passes along one side of the division walls to the point of discharge and the water ofcondensation collected by thel diametrically opposlte scoop causes the water of condensation' to flow along the opposite side of the division walls to the lpoint of discharge.

In testimony of which invention, we hereunto set our hands. WILLIAM S. ROVLEY'.

JAMES VARN ER BUTTERVVORTH. 

